He embarked on a journey to the world of Kōsen.

A baby's fontanelle closes a few months after birth.

Izumi is my best friend.

Izumi is my best friend.

Aisen is my best friend.

The well in this village is very clean, and delicious water is springing up.

The underground water in this area is very clean and is used as drinking water.

He traveled around the world in search of the elixir of life.

Every morning, I sprinkle water on the flowers in my garden.

Every morning, I sprinkle water in the garden.